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Silentflex® Tools

Vibration isolation calculator

Pick your application, enter the machine data and see instantly how much vibration you can stop, which natural frequency you need and which Silentflex® mounts fit.

1What are you isolating?
2How is it mounted and where does the vibration come from?

How it is fixed

Source of the vibration

3Machine data

Machine plus base frame, fluids and anything it carries.

Usually 4. Use more for long or heavy bases.

Running speed of the machine. We use the lowest speed it runs at.

4How much isolation?
90%

Share of vibration that does not reach the floor. 90% is the usual target for plant rooms.

5Conditions

Isolation chart

Where your machine sits

The classic selection chart: running speed across, natural frequency of the mounts down. Diagonals show the isolation you get. Your target is the dot; each Silentflex® family is a bar on your running speed. Tap one to plug it into the simulator.

REGION TO AVOIDSEMI-RIGIDVIBRATION ISOLATION50% · 6 dB70% · 10 dB80% · 14 dB90% · 20 dB95% · 26 dB97% · 30 dB98% · 34 dB99% · 40 dB23456810142025354560801001402001201803006001,0001,5003,0006,00012,0000.611.423456810142030406069024812762.127.615.59.946.903.882.481.270.620.280.160.07Frequency of excitation (Hz)Running speed (rpm)Natural frequency of the mounts (Hz)Static deflection (mm)

Theoretical chart without damping, as in the standard selection method: fₙ = 15.8 / √δ.

Simulator

Plug in a mount and watch

Your machine, running on its mounts. Pick a Silentflex® family, plug it in and see how much vibration still reaches the floor. Slow motion, so you can see it.

Speed

0 rpm

Fill in the calculator above to start the machine.

Vibration into the floor– vs. bolted
Machine movement
Natural frequency fₙ
– Hz
Static deflection
– mm
Isolation
–
f / fₙ
–

    Listen to it

    What the floor below hears: your machine bolted down, then on the chosen mount.

    Structure-borne noise

    – dB(A)

    Choose an application and plug in a mount to hear the difference.

    Best with headphones.

    Simulated with the same model as the calculator. Real installations usually reach 30–45 dB. It only cuts noise travelling through the structure, not airborne noise.

    Recommended for your application

    › More families

    Possible, with limitations

    Other families (see why they do not fit)

    Model: one mass on identical mounts, vertical only, damping typical for each construction. Each family covers several models; the simulation uses the softest one in the family. Indicative; an engineer confirms the final model.

    Next step

    Submit your calculation

    Ask our engineers to review it, or request a quote for the mount you choose. We reply within one working day.

    Your calculation

    Your calculation

    Which mount?
    When do you need it?
    Delivery terms (Incoterms)

    Pick-up address:
    C/ Industria 77, Parque Industrial Tirso González 21, 39610 Astillero, Cantabria, Spain
    Mon–Fri 08:00–16:00 (CET)
    +34 942 54 42 23

    Drawings, photos, videos, technical description… Up to 10 files, 25 MB in total.